The view role_usage_grants is meant
to identify USAGE privileges granted on
various kinds of objects to a currently enabled role or by a
currently enabled role. In PostgreSQL, this currently only applies to
domains, and since domains do not have real privileges in
PostgreSQL, this view is empty.
Further information can be found under usage_privileges. In the future, this view may
contain more useful information.

Table 32-25. role_usage_grants Columns

Name

Data Type

Description

grantor

sql_identifier

In the future, the name of the role that granted the
privilege

grantee

sql_identifier

In the future, the name of the role that the
privilege was granted to

object_catalog

sql_identifier

Name of the database containing the object (always
the current database)